2、(0,2),点C是第二象限内一点,且AC=1,则∠AOC的取值范围是()A.0°<∠AOC≦60°B.0°<∠AOC≦30°
C.30°≦∠AOC<90°D.60°≦∠AOC<90°
3.如图,在Rt△ABC中,∠C=90°,BC=3,AC=4.点D在BC边上运动(不与点B,C重合),点E是AB边上一点,且DC=DE,则DC的取值范围是()第5页共5页A.B.
C.D.
4.如图,在△ABC中,AB=15,AC=12,BC=9,经过点C且与边AB相切的动圆与CB、CA分别相交于点E、F,则线段EF
3、长度的最小值是()A.B.
C.D.
5.如图,已知两点A,B在直线l的异侧,点A到直线l的距离AM=2,点B到直线l的距离BN=6,MN=3,点P在直线l上运动,则的最大值为()A.B.
C.D.
第5页共5页6.如图,已知M是平行四边形ABCD中BC边的中点,DM交AC于E,则图中阴影部分的面积与平行四边形ABCD的面积之比是()A.B.
C.D.
7.如图,在△ABC中,∠ACB=90°,AC=2,BC=1,点A、C分别在x轴、y轴上,当点A在x轴上运动时,点C随之在y轴上运动,在运动过程中
4、,点B到原点O的最大距离为()A.B.
C.D.3
8.已知:二次函数的图象如图所示,下列结论中:①abc>0;②2a+b<0;③a+b;④;⑤a>1.其中正确的项是()
第5页共5页A.①⑤B.①②⑤
C.②⑤D.①③④
内部资料，请勿外传！9JWKffwvG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ^!djs#XuyUP2kNXpRWXmA&UE9aQ@Gn8xp$R#͑Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5
5、pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5ux^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT
6、#&ksv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmUE9aQ@Gn8xp$R#͑Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu#
7、#KN&MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5ux^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRrWwc^v
8、R9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z8vG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ^!djs#XuyUP2kNXpRWXmA&UE9aQ@Gn8xp$R#͑Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*
